03-29-2012 11:10 PM - edited 03-07-2019 05:52 AM
Hi everyone,
I faced with issue on ME3800.
interface Vlan77
description ### Staging LRS ###
ip dhcp relay information trusted
ip address 10.186.71.1 255.255.255.0 secondary
ip address 10.127.254.1 255.255.255.0
ip helper-address 82.199.96.130
no ip redirects
no ip unreachables
no ip proxy-arp
ip pim sparse-mode
With that configuration there is no problem with DHCP Relay packets.
But if I add on interface #xconnect 82.199.119.1 77 encapsulation mpls it will stop forward DHCP relay packets immediately. All other traffic transfers without problem.
Cisco IOS Software, ME380x Software (ME380x-UNIVERSAL-M), Version 15.1(2)EY1a
Who can explain where is the cause of issue?
Thanks.
04-02-2012 09:44 PM
If anyone have this problem too I can help.
There is a bug.
CSCtx76780 Bug Details
DHCP relay not working on ME3600 when using xconnect under VLAN int | |
Symptoms: DHCP relay does not work on Cisco ME3600. Conditions: This issue is observed if you configure at the same time a "ip Workaround: There is no workaround. |
1st Found-In http://tools.cisco.com/Support/BugToolKit/images/Field%20Definitions.html
15.1(2)EY1a
Fixed-In http://tools.cisco.com/Support/BugToolKit/images/Field%20Definitions.html
15.2(1.18)S0.14
15.2(2.13)S
15.1(2)EY2
It was added on cisco.com bug toolkit recently ))).
01-11-2013 03:11 AM
Hello,
I also would like to point out a bug on ME3600 with ip helper.
I'm running IOS 15.2(2)S2 and all PCs behind the ME3600 passing through ip helper address to get an IP from a central DHCP server, when doing ipconfig /all on the PCs, the DHCP server address is set to the VLAN interface of the ME3600, not the DHCP server !
I've never seen that before.
All other PCs behind other L3 swithes (C3650, C3750 etc..) are showing the right IP address of the DHCP server.
Have you any feedback about a such bug ??
Regards,
Christophe
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